China Journal of Oral and Maxillofacial Surgery ›› 2018, Vol. 16 ›› Issue (1): 48-51.doi: 10.19438/j.cjoms.2018.01.010

• Original Articles • Previous Articles     Next Articles

Minimally invasive extraction of impacted mandibular third molar compressing the inferior alveolar nerve: a comparison of three techniques

WANG Yong1, XU Ying2, YANG Chi1, GE Jing1, CHI Zheng-bin3   

  1. 1.Department of Oral Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine; Shanghai Key Laboratory of Stomatology & Shanghai Research Institute of Stomatology; National Clinical Research Center of Stomatology. Shanghai 200011;
    2.Department of Stomatology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine. Shanghai 200025;
    3.Department of Pediatric Dentistry, Shanghai Ninth People's Hospital, College of Stomatology,Shanghai Jiao Tong University School of Medicine. Shanghai 200011, China
  • Received:2017-08-21 Revised:2017-09-15 Online:2018-01-20 Published:2018-02-11

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Abstract: PURPOSE: Extraction of impacted mandibular third molar compressing inferior alveolar nerve(IAN) is highly related to inferior alveolar nerve injury. The aim of this study was to compare the incidences of IAN injury in orthodontic traction, coronectomy and piezosurgery for the impacted mandibular third molar removal. METHODS: After examination of panoramic radiography and cone-beam computed tomography(CBCT), sixty patients with impacted mandibular third molar compressing the IAN were enrolled in this study. Orthodontic traction, coronectomy and piezosurgery were carried out in 20 patients, respectively. Signs of postoperative neurosensory impairment were recorded. RESULTS: No sign of neurosensory impairment was observed in patients undergoing orthodontic traction or coronectomy. One patient (5%) undergone piezosurgery had postoperative lower lip numbness, and recovered within 1 month after drug treatment. CONCLUSIONS: Orthodontic traction, coronectomy and piezosurgery can reduce the incidence of nerve injury during removal of impacted mandibular third molar compressing IAN.

Key words: Orthodontic traction, Coronectomy, Compressing inferior alveolar nerve, Impacted mandibular third molar

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